asthma definition, meaning, English dictionary, synonym, see also 'asthmatic',' asthmatically','ASTM','asthenia', Collins Medical information about asthma symptoms and relief therapies: doctor produced and written for For Your iPhone. Merriam-Webster's Dictionary For iPhone, iPad, and Android New! For Your iPhone. Get them now! Asthma Definition. Nov 2002. Asthma is a chronic lung disease characterized by inflammation of the lower airways. presents a definition of asthma, a description of the processes on which that definition is basedthe pathophysiology ASTHMA DEFINITION. Asthma is an inflammatory disease of the bronchial tubes, the passageways that carry air in and Asthma. Definition. Asthma is a chronic (long-lasting) inflammatory disease of the airways. In those susceptible to